GB609797A - Improvements in or relating to the production of artificial films - Google Patents
Improvements in or relating to the production of artificial filmsInfo
- Publication number
- GB609797A GB609797A GB8970/46A GB897046A GB609797A GB 609797 A GB609797 A GB 609797A GB 8970/46 A GB8970/46 A GB 8970/46A GB 897046 A GB897046 A GB 897046A GB 609797 A GB609797 A GB 609797A
- Authority
- GB
- United Kingdom
- Prior art keywords
- films
- film
- molten polymer
- heating
- cooled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
- H01B3/422—Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds
- H01B3/423—Linear aromatic polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
A synthetic linear polymeric ester, obtained by heating one or more glycols of the formula HO.(CH2)n.OH, where n is an integer greater than 1 but not greater than 10, with terephthalic acid or an ester-forming derivative thereof, is melted and the molten polymer is formed into a thin layer which is rapidly cooled to form a solid film. The film may be molecularly oriented longitudinally or laterally by drawing, rolling, stamping or similar operation. Ethylene, trimethylene, tetramethylene, hexamethylene or decamethylene glycol may be esterified with terephthalic acid or its aliphatic, cycloaliphatic, or aryl esters, or its acid halides, or ammonium or amine salts. The molten polymer may be cooled by air, water, or other inert fluid, or by a high melting metal surface. Films may be formed by pouring the molten polymer on to a flat metal tray and cooling by means of air. The polymer may be extruded through a slot orifice and the film may be cooled on extrusion by jets of cold inert gas, immersion in an inert liquid, or by contact with a metal surface which is itself cooled by jets of a cold fluid or by immersion in a liquid. The polymer may be extruded in the form of a large diameter tube with thin walls and the tube may be slit and rolled out to form a sheet. The films may be stretched after extrusion while they are being quenched. After quenching, the films are transparent. They may be rendered opaque by heating so as to induce crystallization. They may be drawn, rolled, or stamped, after quenching. The shrinkability may be reduced by subjecting the films to a temperature higher than the temperature at which they have been drawn, and while they are under tension. In an example, polyethylene terephthalate is heated in nitrogen to 285 DEG C. and the molten polymer is forced through a filter pack of sand and stainless steel gauze, and through a slot orifice. The ribbon of molten polymer is passed into a quenching bath of cold water through pinch rolls which stretch the film and pass it to a winding reel. The film is then passed to a stretching machine consisting of two pairs of pinch rolls, take-off reel and winding reel. The apparatus is enclosed in a mineral oil bath heated to 70 DEG C. The resiliency of the stretched film is increased by heating it under tension in mineral oil at 200 DEG C. The films have high tensile strength, high dielectric strength, high resistance to acids and organic liquids, good weathering properties, and high resistance to attack by insects and bacteria. They may be used for wrapping material, insulating material, clothing and curtains. A drawn film which has not been heat set may be wrapped round an article, the edges may be heat sealed, and then the closed package may be shrunk on to the wrapped article by heating. The films may be produced in tubular form. Specifications 542,509, 567,358 and 578,079 are referred to.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE472050D BE472050A (en) | 1946-03-22 | ||
CA529669A CA529669A (en) | 1946-03-22 | Production of films | |
NL64810D NL64810C (en) | 1946-03-22 | ||
GB8970/46A GB609797A (en) | 1946-03-22 | 1946-03-22 | Improvements in or relating to the production of artificial films |
IE12647A IE17938B1 (en) | 1946-03-22 | 1947-03-04 | Improvements in or relating to the production of artificial films |
AU10756/47A AU136509B1 (en) | 1946-03-22 | 1947-03-19 | Artificial articles |
FR943517D FR943517A (en) | 1946-03-22 | 1947-03-21 | Artificial dandruff |
CH258014D CH258014A (en) | 1946-03-22 | 1947-03-21 | Process for making artificial films. |
DEP19259A DE818422C (en) | 1946-03-22 | 1948-10-23 | Process for making films |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8970/46A GB609797A (en) | 1946-03-22 | 1946-03-22 | Improvements in or relating to the production of artificial films |
Publications (1)
Publication Number | Publication Date |
---|---|
GB609797A true GB609797A (en) | 1948-10-06 |
Family
ID=9862811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8970/46A Expired GB609797A (en) | 1946-03-22 | 1946-03-22 | Improvements in or relating to the production of artificial films |
Country Status (9)
Country | Link |
---|---|
AU (1) | AU136509B1 (en) |
BE (1) | BE472050A (en) |
CA (1) | CA529669A (en) |
CH (1) | CH258014A (en) |
DE (1) | DE818422C (en) |
FR (1) | FR943517A (en) |
GB (1) | GB609797A (en) |
IE (1) | IE17938B1 (en) |
NL (1) | NL64810C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3504075A (en) * | 1967-10-26 | 1970-03-31 | Eastman Kodak Co | Method of manufacturing high-gloss polymeric films |
EP1207041A1 (en) * | 2000-11-20 | 2002-05-22 | Transhield AS | Material and method for protecting articles |
US8349422B2 (en) | 2008-04-24 | 2013-01-08 | Saudi Basic Industries Corporation | Flexible intermediate bulk container |
TWI455967B (en) * | 2008-04-24 | 2014-10-11 | Saudi Basic Ind Corp | Process for making opaque polyester film |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2823421A (en) * | 1952-05-12 | 1958-02-18 | Du Pont | Stretching of polyethylene terephthalate film |
-
0
- NL NL64810D patent/NL64810C/xx active
- CA CA529669A patent/CA529669A/en not_active Expired
- BE BE472050D patent/BE472050A/xx unknown
-
1946
- 1946-03-22 GB GB8970/46A patent/GB609797A/en not_active Expired
-
1947
- 1947-03-04 IE IE12647A patent/IE17938B1/en unknown
- 1947-03-19 AU AU10756/47A patent/AU136509B1/en not_active Expired
- 1947-03-21 CH CH258014D patent/CH258014A/en unknown
- 1947-03-21 FR FR943517D patent/FR943517A/en not_active Expired
-
1948
- 1948-10-23 DE DEP19259A patent/DE818422C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3504075A (en) * | 1967-10-26 | 1970-03-31 | Eastman Kodak Co | Method of manufacturing high-gloss polymeric films |
EP1207041A1 (en) * | 2000-11-20 | 2002-05-22 | Transhield AS | Material and method for protecting articles |
US8349422B2 (en) | 2008-04-24 | 2013-01-08 | Saudi Basic Industries Corporation | Flexible intermediate bulk container |
TWI455967B (en) * | 2008-04-24 | 2014-10-11 | Saudi Basic Ind Corp | Process for making opaque polyester film |
US9556540B2 (en) | 2008-04-24 | 2017-01-31 | Saudi Basic Industries Corporation | Process for making opaque polyester film |
Also Published As
Publication number | Publication date |
---|---|
BE472050A (en) | |
IE17938B1 (en) | 1950-03-15 |
FR943517A (en) | 1949-03-10 |
AU136509B1 (en) | 1947-02-28 |
DE818422C (en) | 1951-10-25 |
CH258014A (en) | 1948-11-15 |
NL64810C (en) | |
IE17938L (en) | 1947-09-22 |
CA529669A (en) | 1956-08-28 |
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